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An Art Deco sapphire and diamond ring, France, 1920s, collet-set with a step-cut sapphires, to
An Art Deco sapphire and diamond ring, France, 1920s, collet-set with a step-cut sapphires, to shoulders set with calibré-cut sapphires, within borders of single-cut diamonds, mounted in platinum, size M1/2, French assay mark for platinum, partial French maker's mark
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